Antifriction journal-bearing



(No Model.)

- 5 D. KBMPSTER.

ANTIFRIGTION JOURNAL BEARING. &

No. 585,580. I Patented June 29, 1897.

, 8 7 5 E515. Fail]. E5111 \X/I'h BsEJes IljEZElitUl" 7 @OAW 4 @Wz26 UNITED STATES DANIEL E. KEMPSTER, OF BOSTON, MASSACHUSETTS.

ANTIFRICTION JOURNAL-BEARING.

SPECIFICATION forming part of Letters Patent No. 585,580, dated June 29, 1897.

Application filed October 5, 1896. Serial No. 607,829. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL E. KEMPSTER, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Antifriction J ournal-Bearings; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled. in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

My invention relates to antifriction journal-bearings for sheaves, wheels, &c. and has for its object the production of an improved device of simple and inexpensive construction.

My invention consists in the special construction, combination, and arrangement of parts forming the antifriction-bearing, and these special features are hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, in which like reference-numerals indicate like parts, Figure 1 represents an end view of my invention as applied to a bushing or casing for sheaves, wheels, &c. Fig. 2 is a vertical section of the same on the line a; m in Fig. l. The journal for the bearing is shown in dotted lines in both the aforesaid views. Fig. 3 is a vertical section of a portion of a'wheel embodying my invention. Fig. 4 is a detail section of the bushing or casing. Figs. 5 and 6 are detail Views of the antifriction-roll. Figs. 7 and 8 are detail views of the antifriction-roll separating-diskz Figs. 9 and 10 are detail views of the spring-retaining ring or band. Fig. 11 is a detail view of one other form of said spring or ring. I

It should be understood that, broadly speaking, the use of antifriction-rolls and separating-disks within a circular casing'is not new in the art; but I am not aware that the par ticular improved construction-and?arrangement of such parts incombiilation'fas.eonstitutes my invention, has ever before been known or used.

Referring to the drawings, 2 represents the bushin g or casing, preferably formed integral, having the interior circular track-surfaces 3 3, which are separated by a narrow projecting annular rib 4, as shown in Fig. 4.

The bushing or casing is preferably provided with means, such as the outer flange 5, for securing it to the wooden sheave or wheels by suitable screws.

Instead of the flange, projecting ears upon the sides of the bushing or casing may be used, as shown in dotted lines in Fig. 1.

When the sheaves or wheels are composed Wholly of metal, the circular bushing or casing 2 is formed integral therewith, as shown in Fig. 3.

The sheaves or wheels to which my improved bearing may be applied can be made of any suitable material, and the faces thereof may be grooved or shaped in any style desired.

The antifriction-rolls 6 are distributed e11- tirely around the interior of the bushing or casing, each roll having the annular groove 7 about its center of sufficient width to loosely receive the annular projecting rib a, said groove being preferably of greater depth than said rib, so the smaller diameter of the rolls will not bear upon the top surface of the rib, thus allowing the body of the rolls to bear and roll upon the track-surfaces 3 3 of the bushing or casing, being held positively in proper alinement therewith by the rib 4, which also takes directly all end thrust of said rolls or of the journal 8 while in operation.

The antifriction-rolls 6 are kept apart from each other to'avoid frictional contact between them and so that they may each perform their allotted function apart from the others by the antifriction-disks 9, placed between the rolls, said disks being slightly thinner than the central groove in said rolls, so as to fit loosely therein and roll upon the smaller diameters of said rolls and upon the top surface of the annular rib 4:, each disk being in contact with twozr olls and serving as rolling separators therefor.

The bushing or casing being preferably made whole or in one piece, the antifriction rolls and disks are necessarily all put in from the center and pressed outward into position against the interior surface of the casing, the rolls first and then the disks between them.

Antifriction bearings are manufactured and sold to a large extent independent of the journals and sheaves for the purpose of repairs, and also to block-makers who do not have an antifriction-bearin g of their own, and it is therefore necessary to provide some means for holding the antifriction rolls and disks in their proper places within the bushing or casing when the ordinary pin or journal of the sheave or hearing is lacking or re movedtherefrom. Otherwiseinshippingand transportation the antifriction device would fall apart and portions of it be liable to get lost. To obviate this disadvantage, I form a thin spring, ring, orband 10, preferably of flat wire, as shown in Figs. 9 and 10,alitt1e narrower than the central groove 7 in the rolls 6.

Said ring or spring snaps into the groove of the rolls and keeps them and their separatingdisks 9 out against the interior surface of the bushing or casing in proper place independent of the pin or journal, said disks bearing against the smaller diameters of the rolls 6 and keeping them out in contact with the traclosurfaces 3 3 of the bushing or casing, the disks being capable of thus retaining the rolls out in proper position by reason of their centers being nearer the center of the bushing or casing than are the centers of the rolls, as plainly shown in Fig. 1.

The thin retaining ring or band 10, if preferred, can be made in the form of a short section of coiled-wire spring, as shown in Fig. 11, and be inserted in the roller-grooves within the bushing or casing and set to retain the disks and rolls, as before described. The retaining-ring is preferably of larger internal diameter than the diameter of the pin or journal of the sheave, as shown in Figs. 1 and 2, the journal being shown in dotted lines therein, and is only of sufficient thickness or rigidity to hold the parts in place without undue friction thereon.

The antifricti0n-rolls 6 are made in length the thickness of the sheave or wheel, thus giving a long bearing-surface, and said rolls are held positively in alinement with the sheave or wheel and so as not to have any undue endwise motion by direct contact of the central grooves of the rolls with the rigid annular projecting rib of the bushing or casing, independent of the separator-disks 9, as plainly shown in Figs. 2 and 3.

It must be obvious that where the separator-disks 0 travel upon the top surface of the annular rib 4, as I have shown, nothing can act to in any wise bind or clog their free rotary movement thereon, but quite the contrary would be the effect if said disks traveled in an annular groove or channel within the bushin g or casing, for said groove or channel would soon become filled up with grease and dirt, and thus retard the free rotary movement of the disks. Furthermore, I have found that the great strain and wear upon the track surfaces 3 3 by the rolls 6 when in practical use gradually expands or'spreads said surfaces, so that in time a central groove or channel within the casing between said surfaces becomes narrowed up to such an extent as to tightly bind the separator-disk, so as to completely destroy the antifriction qualities of the device, and this can never occur with my improved construction herein described and shown.

It will be seen that my improved construction is simple, durable, and inexpensive, and that every part of the device where friction would ordinarily occur is furnished with a moving antifriction-surface, thus reducing the friction to a minimum when the bearing is in practical use.

By my invention I am enabled to cheaply produce a better quality of antifriction-bearing than has heretofore been in use and one which can be made up in quantities and shipped independent of the journal without derangement or loss of parts.

It should be understood that my invention is applicable to any form of journal-bearing without departing from the spirit of my invention.

Having thus fully set forth the nature, object, and construction of my invention, I desire to secure by Letters Patent and claim-- 1. In an antifriction journal-bearing, the combination with a bushing or casing, a series of antifriction-rolls therein each having an annular groove at about its center, and separating-disks between said rolls and within said grooves, of a central spring-ringwithin the grooves of the rolls adapted to retain the disks and rolls out against the bushing or casing in working position, for the purpose set forth.

2. In an antifriction journal-bearing, the combination of an integral bushing or oasing having a substantially central internal annular projecting rib, a series of antifriction-rolls each having an annular groove at about its center, a series of separating antifriction-disks, one between each two rolls and in the grooves thereof and traveling on the top surface of the annular projecting rib, with a central retaining ring or band within the grooves of the rolls holding said disks and rolls in position, for the purpose set forth.

3. In combination, the integral bushing or casing having an internal substantially centrally-arranged annular projecting rib, a series of antifriction-rolls each having an annular groove at about its center, a series of antifriction-disks within said grooves, one between each two rolls and traveling on the top surface of the projecting rib, and a journal, for the purpose set forth.

4:. In combination, an integral bushing or casi'n g having a substantially central internal projecting annular rib: a series of antifriction-ro1ls, each having an annular groove at about its center: a series of antifrietion sepa- In testimony whereof I affix my signature rating-disks, one between each two rolls, in in presence of tWo Witnesses. the grooves thereof and traveling on the top surface of the annular rib: a central retaining spring, ring or band, within the grooves of the rolls: and a journal: all substantially as and for the purpose set forth.

DANIEL E. KEMPSTER.

Witnesses:

HENRY CHADBOURN, v S. BAYARD THOMPSON. 

